So this arrived in the mail http://www.amazon.com/gp/product/B00S5M36J2?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s01
Installed in a PCIe x4 slot and it works great.
Samsung 950Pro in the M.2 slot CrystalMark scores.
CrystalDiskMark 5.1.0 x64 (C) 2007-2015 hiyohiyo
Crystal Dew World : http://crystalmark.info/
MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
KB = 1000 bytes, KiB = 1024 bytes
Sequential Read (Q= 32,T= 1) : 850.093 MB/s
Sequential Write (Q= 32,T= 1) : 793.041 MB/s
Random Read 4KiB (Q= 32,T= 1) : 748.490 MB/s [182736.8 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 327.864 MB/s [ 80044.9 IOPS]
Sequential Read (T= 1) : 785.037 MB/s
Sequential Write (T= 1) : 749.137 MB/s
Random Read 4KiB (Q= 1,T= 1) : 50.588 MB/s [ 12350.6 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 207.909 MB/s [ 50759.0 IOPS]
Test : 1024 MiB C: 28.7% (68.3/238.4 GiB) [Interval=5 sec]
Date : 2015/12/24 16:33:45
OS : Windows 7 Home Premium SP1 6.1 Build 7601
And Samsung 950Pro in the PCIe x4 slot
CrystalDiskMark 5.1.0 x64 (C) 2007-2015 hiyohiyo
Crystal Dew World : http://crystalmark.info/
MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
KB = 1000 bytes, KiB = 1024 bytes
Sequential Read (Q= 32,T= 1) : 1664.940 MB/s
Sequential Write (Q= 32,T= 1) : 962.849 MB/s
Random Read 4KiB (Q= 32,T= 1) : 773.641 MB/s [188877.2 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 334.563 MB/s [ 81680.4 IOPS]
Sequential Read (T= 1) : 1531.145 MB/s
Sequential Write (T= 1) : 963.601 MB/s
Random Read 4KiB (Q= 1,T= 1) : 50.300 MB/s [ 12280.3 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 241.129 MB/s [ 58869.4 IOPS]
Test : 1024 MiB C: 24.0% (57.3/238.4 GiB) [Interval=5 sec]
Date : 2016/01/07 14:52:33
OS : Windows 7 Home Premium SP1 6.1 Build 7601